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Treatment of Automotive Paint Wastewater Using Electroflotation: Kinetic Study, Influencing Factors and Data Analysis

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Abstract

A comprehensive laboratory experimental study was conducted on the application of electroflotation in removal of paint from automotive paint system. In 40 min testing time and under 44 A/m2 current density, the total suspended solids (TSS) removal rates ranged from 90.39 to 97.43%. The first and second-order rate constants were developed. The kinetics of the TSS removal from the automotive paint wastewater was best described with the second-order rate constants. Two statistical methods were applied to identify the key factors for electroflotation performance among the Initial TSS Concentration, Current Density, water pH, Zeta Potential and Electrical Conductivity. It was confirmed that in both methods, the Initial TSS Concentration and Current Density were the most significant variables. Further, through Response Surface Methodology and Stepwise Regression analysis, equations of the removal rate of TSS vs reaction time and applied current density were produced for different wastewater samples.

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Acknowledgments

This study was supported by the University of Western Ontario and the National Science and Engineering Research Council of Canada (NSERC). The experimental program was partially funded by Daimler Chrysler Co.

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Authors and Affiliations

  1. Department of Civil and Environmental Engineering, Western University, London, ON, N6A 5B9, Canada

    Reza Mohtashami, Julie Q. Shang & Yanqing Xu

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  1. Reza Mohtashami
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  2. Julie Q. Shang
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  3. Yanqing Xu
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Correspondence to Reza Mohtashami.

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Mohtashami, R., Shang, J.Q. & Xu, Y. Treatment of Automotive Paint Wastewater Using Electroflotation: Kinetic Study, Influencing Factors and Data Analysis. Environ. Process. 5, 577–591 (2018). https://doi.org/10.1007/s40710-018-0324-5

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  • DOI: https://doi.org/10.1007/s40710-018-0324-5

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